But analysts question the logic behind this worry. China would struggle to unload that much debt at once -- and its own portfolio would dramatically lose value during such a fire sale.

"The idea of weaponizing foreign-exchange holdings for an economic attack on the United States is just as likely to hurt the weaponeer," said Janney's LeBas.

The bigger risk is that China or another country weans itself off US debt by slowing its purchases and waiting for existing Treasuries to mature.

"Gradualism could have a long-term impact on the United States. But that would be a patient policy that would not reveal itself easily," said David Kotok, chairman of Cumberland Advisors.

Remember Trump is President - he creates Chaos himself with ridiculous policy pronuncements where none ever existed before - imagine if a major Financial Catastrophy was directed at the USA from another Country

Trump has been Impotent to even Recognize the Fact That Russia and Putin Attacked our 2016 Election and is currently attacking Democratic Senators right now and the US President ignores it all